Balancing and phasing new driveshaft components
Thread Starter
Pole Position
Joined: Nov 2014
Posts: 3,254
Likes: 418
From: CALIFORNIA
The shop manual for 1994 states not to remove the bolts attaching the shaft to the guibo and if the guibos are damaged to replace the whole DS assembly. According to the dealer parts diagram there are not different weighted bolts available for purchase.
I took the time to weigh the bolts and all 12 weighed 67 grams. So with that info I can safely assume they were not balanced with the guibos attached from the factory. Possibly one reason my local guy could not get it to balance, since I told him it has to be balanced with guibos attached due to the balancing bolts...
The manual also states the companion flanges on each end are to be 180 degress opposed to each other. IIRC that is technically "out of phase". From your video it seems the flanges for the 98-00 are aligned "in phase" at each 120 degree bolt hole on either end. Other pictures of used 98-00 driveshafts confirm this. Would be nice if toyota could give us more details on why there are such subtle differences between the model years.
As for B&T, he was not interested in taking on another one. He did recommend someone that can make a new shaft from end to end but made it seem like balancing the original would take months to achieve even with proper fixturing... oh well.
Anyways, this info reveals there is hope in finding a solution.
I took the time to weigh the bolts and all 12 weighed 67 grams. So with that info I can safely assume they were not balanced with the guibos attached from the factory. Possibly one reason my local guy could not get it to balance, since I told him it has to be balanced with guibos attached due to the balancing bolts...
The manual also states the companion flanges on each end are to be 180 degress opposed to each other. IIRC that is technically "out of phase". From your video it seems the flanges for the 98-00 are aligned "in phase" at each 120 degree bolt hole on either end. Other pictures of used 98-00 driveshafts confirm this. Would be nice if toyota could give us more details on why there are such subtle differences between the model years.
As for B&T, he was not interested in taking on another one. He did recommend someone that can make a new shaft from end to end but made it seem like balancing the original would take months to achieve even with proper fixturing... oh well.
Anyways, this info reveals there is hope in finding a solution.
Am tired of BS artists in general.
Am swimming in it when it comes time to acquire answers to basic questions...they wing it from their perspective...
Whether attempting to obtain meaningful technical support (Toyota) or red neck drive shaft shops yon hither.
Intermediate
Joined: Jul 2009
Posts: 445
Likes: 93
From: NY
The early LS 400 manuals say that they do use balancing bolts at the guibos. You leave the guibos on the driveshaft and index each bolt that you take off the trans/diff flanges.
I am sorry that there are professionals who have no sense of adventure, no love of a good challenge ...
I am sorry that there are professionals who have no sense of adventure, no love of a good challenge ...
Intermediate
Joined: Oct 2019
Posts: 299
Likes: 63
From: Florida
The early LS 400 manuals say that they do use balancing bolts at the guibos. You leave the guibos on the driveshaft and index each bolt that you take off the trans/diff flanges.
I am sorry that there are professionals who have no sense of adventure, no love of a good challenge ...
I am sorry that there are professionals who have no sense of adventure, no love of a good challenge ...
The operating angle of the driveshaft is extremely important as well. The U joint (joint 2) is to be anywhere from -0.75 to 0.25 degrees. Where the driveshaft and differential connect (Joint 3) is to be anywhere from 0.05 to 1.05 degrees. The manual says to always check these angles and adjust if necessary, whenever the propeller shaft is removed from the vehicle.
I think one of my only options at this point is to use the trial and error hose clamp method.
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